glox/tests/functions.lox

print "native function";

print clock();

fun count(n) {
    print n;
    if (n > 1) count(n - 1);
    print n;
}

count(10);

fun hi(name, surname) {
    print "hello, " + name + " " + surname + "!";
}

hi("John", "Doe");


fun re(turn) {
    print "before return";
    return turn;
    print "should not be printed";
}

print re("turn");


fun sum(start, end) {
    if (start == end) return start;
    return start + sum(start + 1, end);
}

print sum(1, 3);

fun fib(n) {
    if (n <= 1) return n;

    return fib(n - 2) + fib(n - 1);
}

for (var i = 1; i <= 10; i = i + 1) {
    print fib(i);
}

fun makeCounter() {
    var i = 0;

    fun incr() {
        i = i + 1;
        print i;
    }

    return incr;
}

var counter = makeCounter();

counter();
counter();

fun thrice(fn) {
    for (var i = 1; i <= 3; i = i + 1) {
        fn(i);
    }
}

thrice(fun (a) { print a; });

print fun () { return "hello, "; }() + "world";